CAJ | 학술논문

干燥带的产生极大地改变了污秽绝缘子表面电场分布,并且干燥带与局部电弧以及污闪的发生密切相关.基于此,利用ANSYS有限元分析软件建立了绝缘子三维电场计算模型,利用准静态谐分析法分析了交流情况下干燥带的形成、沿面分布、宽度、角度、数目等对污秽绝缘子沿面电位及电场分布的影响.结果表明:干燥带对污秽绝缘子电场分布有明显的畸变作用,干燥带区场强变大;干燥带区最大场强与其在绝缘子表面位置有关,沿绝缘子表面轴向呈非对称U型变化趋势,且下表面产生的干燥带场强大于上表面;干燥带上各处场强大小不同,中心处场强最大,且随干燥带在绝缘子表面周向角度增加而增加,随轴向宽度增加而减小;干燥带数目的增加会削弱彼此的场强.
간조대적산생겁대지개변료오예절연자표면전장분포,병차간조대여국부전호이급오섬적발생밀절상관.기우차,이용ANSYS유한원분석연건건립료절연자삼유전장계산모형,이용준정태해분석법분석료교류정황하간조대적형성、연면분포、관도、각도、수목등대오예절연자연면전위급전장분포적영향.결과표명:간조대대오예절연자전장분포유명현적기변작용,간조대구장강변대;간조대구최대장강여기재절연자표면위치유관,연절연자표면축향정비대칭U형변화추세,차하표면산생적간조대장강대우상표면;간조대상각처장강대소불동,중심처장강최대,차수간조대재절연자표면주향각도증가이증가,수축향관도증가이감소;간조대수목적증가회삭약피차적장강.
The appearance of dry band significantly affects the electric field distribution and the partial arc as well flashover. In order to investigate the characteristics of dry band under different conditions, a three-dimension model of polluted insulator was established. The effects of formation, location, width, radian and number of dry band on potential and electric field distribution were investigated based on the analysis of electric field using the finite element method by the ANSYS simulating analysis soft. The results show that there will be obvious aberration in the electric field distribution of insulator when the dry band appears on the surface of polluted insulator,which will strengthen the dry band's electric field. The maximum electric field of dry band is related to its location on the insulator surface, and it has a trend of asymmetric U type along the axial direction on the surface of insulator. The dry band on underside surface of insulator has a larger influence on the electric field distribution than that on upper surface. The maximal value appears at center of dry band, which increases with the growth of dry band angle along the circumferential direction on the surface of insulator, and decreases with the growth of dry band width along the axial direction on the surface of insulator. The increase of dry band number will decrease the electric field reciprocally.